Want To Buy IC 54S188J

[Robert Smith]

I need following ICs for a repair/maintenance contract.

IC P/N 54S188J or P/N 54S188J/883B

Any one having New/Unused ICs, please E-Mail offer to;

robert@ivaroop.com

Indicate date code.

I am looking to buy up to 50 each.

Thanks,
Robert Smith

 

[Jerry G.]

You did not mention the name of the manufacture and model that this part is
out of. For this type of part, you must go to the original manufacture
only!

--

Greetings,

Jerry Greenberg GLG Technologies GLG
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Electronics http://www.zoom-one.com/electron.htm
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"Robert Smith" <robert@ivaroop.com> wrote in message
news:b3ebb387.0310091915.6e643d7@posting.google.com...
I need following ICs for a repair/maintenance contract.

IC P/N 54S188J or P/N 54S188J/883B

Any one having New/Unused ICs, please E-Mail offer to;

robert@ivaroop.com

Indicate date code.

I am looking to buy up to 50 each.

Thanks,
Robert Smith

 

[JeffM]

This appears to be the mil-spec version of a Schottky 32 x 8-Bit OC PROM.

Is this correct?
Is it really going to be used in the Artic or the Saraha?
Could you use the commercial-grade 74S188 just as well?

 

[Michael A. Terrell]

"Jerry G." wrote:

You did not mention the name of the manufacture and model that this part is
out of. For this type of part, you must go to the original manufacture
only!

Jerry Greenberg

IC P/N 54S188J or P/N 54S188J/883B

Once again, Jerry, you need to recognize a part number before posting
a meaningless reply. It is/was a standard component from the 54S/74S
family of TTL logic. It was made by about a dozen companies, when it was
in production. It may show up as surplus, but you have to be careful
that it isn't already programmed. Even then, you can luck out and find
some that can still be burnt, because the existing code doesn't
conflict with the new code. These are OTP parts, using Nichrome fuses
that have to be blown to program the part. Early burglar and fire alarm
dialers used them to store phone numbers, and they sometimes turn up
surplus after an alarm company has stopped reprograming the older
dialers.

http://www.jameco.com/Jameco/Products/ProdCT/p074.pdf lists the 74S188
16 256-bit (32 x 8) PROM O.C. (27S18) priced at:

1 10 100
$4.95 $4.25 $3.19

--


Michael A. Terrell
Central Florida

 

[CWatters]

"Michael A. Terrell" <mike.terrell@earthlink.net> wrote in message
news:3F874691.50D447BF@earthlink.net...

Early burglar and fire alarm
dialers used them to store phone numbers, and they sometimes turn up
surplus after an alarm company has stopped reprograming the older
dialers.

I believe they were also used to perform logic functions (ed decode
microcode in early mini computers).